From tram crashes to motel fires, the disaster plotline is a soap opera staple.

Next week, tragedy will strike the residents of ITV’s Coronation Street, as the roof of the Underworld textiles factory collapses, leaving Sally Metcalfe (Sally Dynevor) and Gina Seddon (Connie Hyde) trapped in the rubble.

Corrie bosses have teased that one character will die as a result of the collapse, which looks likely to be down to sabotage.

It’s not the first time such trouble has come to the cobbles of Weatherfield.

If it existed outside Soapland, health and safety officials would likely have closed the Underworld factory years ago.

David Brown, deputy TV editor for the Radio Times, says of the location: “Underworld is massively dangerous. It’s just completely cursed.

“Over the years, we’ve had people falling down the stairs and dying, a body buried under the floor, a siege on the premises and the whole place being engulfed by fire.

“You’d probably get cheaper life insurance working as a bomb disposal officer than you would working as a machinist at Underworld and yet still people turn up to stitch knickers there day in day out.”

It’s not just the residents of Coronation Street who dice with death just by living there.

Major disasters like the Underworld roof collapse or Emmerdale’s storm of 2003 certainly contribute to the death toll.

Brown says there’s a reason disaster plotlines hit Soapland so regularly: “Disaster plotlines are an effective way of both uniting the community and giving the soap a ratings spike.

“Obviously, because we follow these characters over years and sometimes decades, we’re emotionally invested in their fates.

“So it means more to see, say, Sally [Metcalfe in Coronation Street] lying unconscious in the rubble than it would do witnessing someone in a three-part drama going through something similar because she’s been a part of the show since the mid-80s.”

TV Times critic Emma Bullimore adds that big events are “a way in for new viewers (or viewers who have drifted away for a bit), and an exciting change of pace for loyal fans.”

Disasters in soaps can also occur for other reasons.

Television historian and author of the book Soap Opera, Dorothy Hobson, tells the BBC: “When new sets are being built it gives an opportunity for disasters as the old set is destroyed.

“Keep an eye open in the next year when EastEnders’ new set will be finished. Who knows what could happen then.”

So where do our TV experts think is the most dangerous place to live in Soapland?

David Brown – Emmerdale

“Down the decades, we’ve had every form of disaster hit Coronation Street. Why anyone would want to live in one of those houses or drink in the Rovers is anyone’s guess. A derailed tram, infernos, car smash-ups – it’s seen it all.

“Though a plane crash AND a helicopter crash in Emmerdale probably makes that village the most hazardous place to live in the UK.”

Emma Bullimore – Casualty

“Soapland isn’t a safe place to live. I’d particularly avoid Casualty – every staff member in that hospital ends up on the operating table eventually!”

Dorothy Hobson – Emmerdale

“Emmerdale is the most dangerous with the recent storyline in 2015 with a storyline entitled Summer Fate, when after a car crash a helicopter fell out of the sky and crashed into the village hall during a wedding.

“In the aftermath two characters were killed and in one of the most spectacular incidents, Val Pollard (Charlie Hardwick) was killed by a shaft of mirror falling onto her.

“The irony of the danger in Emmerdale is that it is set in the countryside where you would expect to be safe.”

It led to the deaths of four regular characters, and to Beckindale being renamed Emmerdale in May 1994.

Around 18 million people reportedly tuned in, and the crash, which cost £1m to stage, certainly got Emmerdale noticed by a wider audience.

Honourable mention should go to Australian soap Neighbours, who killed off three characters in a plane explosion and crash to mark the soap’s 20th anniversary in 2005. Nothing says ‘happy anniversary’ like some airborne carnage!

2. Coronation Street’s tram crash, 2010

The soap’s 50th anniversary was marked with a week of episodes based around a tram crash, which killed off two characters.

The ambitious final episode, which was broadcast live, involved 65 actors and a 300-strong crew portraying the aftermath of a devastating gas explosion.

3. The Crossroads motel fire, 1981

The daytime soap and its short-lived millennium reboot have long since departed from ITV’s schedules, but many soap fans remember this plot as one of the most exciting of the time.

Motel owner Meg Mortimer apparently died in the fire, but later turned up alive, setting sail for a new life aboard the QE2.

4. EastEnders’ fairground collapse, 2004

BBC One’s EastEnders doesn’t have quite the same budget for an annual disaster as soaps on commercial channels do and, boy, did it show in this 2004 plot.

Disaster struck Albert Square in the form of – wait for it – a collapsing helter-skelter.

5. Dynasty’s Moldavian wedding massacre, 1985

US soap Dynasty was never known for its understated plotlines, but this one was more out there than most.

The show’s fifth series ended on a cliffhanger, as Amanda Carrington’s (Catherine Oxenberg) wedding to Prince Michael of Moldavia (Michael Praed) was interrupted by a military coup. The episode ended with most of the wedding party lifeless on the floor, but the following series revealed that all but two of the main cast had survived the disaster.